| 摘要 |
PURPOSE:To prevent foreign matters like a toner from whirling up in a shield member and sticking to a discharging member by constituting a device so that the wind pressure in the inflow side is higher and that in the outflow side is lower when a wind is forcibly blown into the shield member of the discharger. CONSTITUTION:A very narrow corona discharging wire 2 constituting the discharging member connected to a DC high voltage power source 1 is stretched and is so constituted that corona discharge is caused in a body 3 to be electrified. An inflow port 5 of wind or the like is formed on a metallic shield member 4 and a duct 7 and a fan 8 are provided so that wind can be blown forcibly. When wind is blown forcibly from the fan 8 into the shield member 4, the wind pressure is higher in the inflow side and is lower in the outflow side because a shield side wall 6 is expanded outward an at angle theta, and the wind is discharge to the outside from the gap between the lower end of the side wall 6 and the body 3 to be electrified. Thus, foreign matters 9 such as the toner on the surface of the body 3 to be electrified are prevented from whirling up and sticking to the wire 2. |
